package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill))")
    public void autoFillPointCut(){};

    @Before("autoFillPointCut()")
    public void AutoFill(JoinPoint joinPoint){
        log.info("开始自动填充公共字段....");

        //获取注释的值
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//得到签名对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();

        //准备数据
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();

        //获得参数对象

        Object[] args = joinPoint.getArgs();
        Object object = args[0];//默认第一个参数是需要自动赋值的参数

        //将字段自动赋值到参数上
        try {
            Method setCreateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
            Method setUpdateUser = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            Method setUpdateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setCreateTime = object.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
            if (value == OperationType.INSERT) {
                setCreateUser.invoke(object,id);
                setUpdateUser.invoke(object,id);
                setUpdateTime.invoke(object,now);
                setCreateTime.invoke(object,now);
            }else if (value == OperationType.UPDATE){
                setUpdateUser.invoke(object,id);
                setUpdateTime.invoke(object,now);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }


    }
}
